A conveying device for the production of traditional Chinese medicine pills

Abstract

This invention discloses a conveying device for the production of traditional Chinese medicine pills, relating to the technical field of conveying equipment for traditional Chinese medicine pill production. It includes a feeding machine and a conveyor platform distributed at the end of the feeding machine. The conveyor platform has a material dispersing mechanism inside; a cooling mechanism is provided on the side of the conveyor platform; and a limiting mechanism is provided on the top of the material dispersing mechanism. Through the combination of the material dispersing mechanism and the limiting mechanism, the pills located at the top of the conveyor platform are evenly spread inside the material dispersing mechanism and conveyed in a designated direction. Simultaneously, the cooling mechanism uses air cooling to accelerate the solidification rate of the pills and reduce the adhesion rate between the pills and the material dispersing mechanism. This invention discloses a conveying device for the production of traditional Chinese medicine pills, which effectively ensures the quality of the finished pills and improves ease of use.

Description

Technical Field

[0001] This invention relates to the field of equipment technology for the production and transportation of traditional Chinese medicine pills, and in particular to a conveying device for the production of traditional Chinese medicine pills. Background Technology

[0002] Pills are a type of traditional Chinese medicine or Western medicine preparation. They are made by grinding the medicine into powder, mixing it with water, honey, or starch paste, and then forming it into a pill shape. Depending on the size and preparation method, pills can be further divided into large honey pills (each weighing more than 0.5 grams) and small honey pills (each weighing less than 0.5 grams). Traditional Chinese medicine pills are an ancient dosage form, characterized by their long-lasting and mild effects, greater convenience than powders, and portability. Coatings can mask unpleasant odors and prevent oxidation, spoilage, and moisture absorption. For highly toxic or irritating drugs, delayed absorption can reduce toxicity and adverse reactions.

[0003] The production process of traditional Chinese medicine pills involves grinding, sieving, refining honey, mixing the medicine, kneading, rolling into strips, and making pills. After the pills are prepared, additional conveying equipment is needed to transport them to the packaging workshop. However, when the existing equipment transports the pills, a large number of pills are concentrated on the top of the conveying equipment. Since most of the pills are made of honey, they will stick together on the top of the conveyor belt after being in contact with each other for a long time. As a result, after the pills are transported to the designated position, the operators need to separate the sticky pills. This affects the convenience of operation and the quality of the finished pills. Summary of the Invention

[0004] This invention discloses a conveying device for the production of traditional Chinese medicine pills, aiming to solve the technical problem that when existing equipment conveys pills, a large number of pills are concentrated on the top of the conveying equipment, and the pills that are in contact with each other for a long time will stick together on the top of the conveyor belt, which affects the convenience of operation and the quality of the finished pills.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A conveying device for producing traditional Chinese medicine pills includes a feeding machine and a conveyor platform distributed at the end of the feeding machine. The conveyor platform is equipped with a dispersing mechanism for dispersing and transporting the pills. The dispersing mechanism includes a conveyor belt rotatably installed inside the conveyor platform and a rotating roller rotatably installed inside the conveyor platform. The rotating roller is rotatably sleeved at both ends of the conveyor belt. A motor is horizontally fixed on the outside of the conveyor platform, and the output end of the motor horizontally penetrates into the interior of the conveyor platform and is connected to the end of one of the rotating rollers.

[0007] The side of the conveyor platform is provided with a cooling mechanism for rapid air cooling of the pills. The cooling mechanism includes a cavity plate fixedly installed on the side of the conveyor platform.

[0008] The top of the dispensing mechanism is provided with a limiting mechanism for limiting the position of the pills. The limiting mechanism includes two shafts rotatably installed inside the dispensing machine platform. Paddles are fixedly installed at the ends of the shafts and are distributed inside the cavity plate.

[0009] By using the material dispersing mechanism in conjunction with the limiting mechanism, the pills located at the top of the conveyor platform are evenly distributed inside the material dispersing mechanism and conveyed in a designated direction. At the same time, the cooling mechanism uses air cooling to accelerate the solidification rate of the pills and reduce the adhesion rate between the pills and the material dispersing mechanism.

[0010] The conveyor platform, equipped with an additional material dispersing mechanism at the end of the feeding machine, disperses the gathered Chinese medicine pills poured onto the top of the conveyor platform by the dispersing and limiting mechanisms. This effectively prevents the pills from piling up and sticking together during transport. The additional cooling mechanism accelerates the cooling of the pills on top of the dispersing mechanism through air cooling, further reducing the adhesion between the pills and the conveyor platform. This ensures both the efficiency of traditional conveying equipment and the quality of the finished Chinese medicine pills.

[0011] In a preferred embodiment, the bulk material mechanism further includes a plurality of circular grooves uniformly provided inside the conveyor belt for holding the pills, and a plurality of push blocks uniformly fixed on the outside of one of the rotating rollers for ejecting the pills, the push blocks being pressed into the interior of the circular grooves.

[0012] By incorporating a rotating roller structure with a mounting block and a conveyor belt structure with circular grooves inside the conveyor platform, the rotating roller is driven by a motor, which in turn drives the conveyor belt to rotate synchronously. The rotating conveyor belt can disperse and transport the accumulated Chinese medicine pills using the dispersed circular grooves. Simultaneously, the top block squeezes the bottom of the circular grooves. When the pills are transported to the designated position, the pills inside the circular grooves are unloaded, and the accumulated pills are dispersed, reducing the phenomenon of Chinese medicine pills sticking together during long-term transportation, thereby ensuring the quality of the finished product after the pills cool and solidify.

[0013] In a preferred embodiment, the cooling mechanism further includes an exhaust pipe horizontally fixed inside the conveyor platform, the end of the exhaust pipe being connected through the interior of the cavity plate, and the exhaust pipe being distributed inside the conveyor platform close to one end of the feeding machine platform, while a guide pipe is connected through the end of the cavity plate.

[0014] By installing an exhaust pipe connected to the cavity plate at the end of the conveyor platform, cold air is introduced into the exhaust pipe through the air guide pipe. At the same time, the cold air is sprayed out through the bottom of the exhaust pipe to cool down the Chinese medicine pills piled up at the top of the conveyor belt, thereby accelerating the plasticity of the pills, ensuring that the pills will not deform during subsequent conveying, ensuring the quality of the finished Chinese medicine pills, and reducing the adhesion rate.

[0015] In a preferred embodiment, the limiting mechanism further includes several inner arc rollers fixedly sleeved on the outer side of each shaft, several limiting grooves evenly opened on the top of the conveyor belt, the limiting grooves and several circular grooves being distributed interspersed in the horizontal direction, and several inner arc rollers located on the outer side of the two shafts being distributed interspersed inside each limiting groove.

[0016] By setting up a two-shaft structure with several inner arc rollers, and installing blades at the ends of the shafts, the propulsive force of cold air being discharged from the air duct drives the blades and shafts to rotate, thereby synchronously driving the inner arc rollers to rotate synchronously. In conjunction with several limiting grooves additionally set at the top of the conveyor belt to guide the stacked Chinese medicine pills, a limiting effect is formed on the Chinese medicine pills. At the same time, the Chinese medicine pills are pushed to rotate inside the limiting grooves, thereby causing the Chinese medicine pills to be automatically shaped while waiting, ensuring their regularity as spheres, thus ensuring the quality of the finished Chinese medicine pills and the perfect operation of the equipment.

[0017] In a preferred embodiment, the sidewall of the limiting groove is provided with an arcuate portion, which contacts the top of the adjacent circular groove.

[0018] By providing an arc-shaped surface structure that contacts the circular groove on the side wall of the limiting groove, the Chinese medicine pills accumulated inside the limiting groove can slide along the surface of the arc-shaped surface as the conveyor belt rotates, thereby locking into the inside of the circular groove and ensuring the integrity of the equipment operation.

[0019] As can be seen from the above, the conveying device for producing traditional Chinese medicine pills provided by the present invention has the following improvements and advantages compared with the prior art:

[0020] Firstly, an additional conveyor is installed at the end of the feeding machine. The conveyor has a rotating roller structure with a top block and a conveyor belt structure with circular grooves. The motor drives the rotating roller and the conveyor belt to rotate synchronously. The rotating conveyor belt can disperse and transport the Chinese medicine pills that have been fed into the conveyor and accumulated inside the conveyor using the dispersed circular grooves. At the same time, the top block squeezes the bottom of the circular grooves. When the pills are transported to the designated position, the pills inside the circular grooves are unloaded, dispersing the accumulated pills and preventing them from sticking together during long-term transportation. This ensures the quality of the finished product after the pills have cooled and solidified.

[0021] Secondly, an exhaust duct connected to the cavity plate is installed at the end of the conveyor platform. Cold air is introduced into the exhaust duct through the guide duct, and at the same time, the cold air is sprayed out through the bottom of the exhaust duct to cool down the Chinese medicine pills piled up at the top of the conveyor belt, thereby accelerating the plasticization of the pills and ensuring that the pills will not deform during subsequent conveying. At the same time, two shaft structures with several inner arc rollers are additionally distributed on the side of the exhaust duct. The ends of the shafts are equipped with paddles. The pushing force of the cold air discharged from the guide duct drives the paddles and shafts to rotate, thereby synchronously driving the inner arc rollers to rotate synchronously. In conjunction with several limiting grooves additionally set at the top of the conveyor belt to guide the piled Chinese medicine pills, forming a limiting effect on the Chinese medicine pills and pushing the Chinese medicine pills to rotate inside the limiting grooves. This causes the Chinese medicine pills to automatically shape while waiting, ensuring their regularity as spheres, thereby further improving the quality of the finished Chinese medicine pills and reducing the possibility of pills sticking together, ensuring the perfect operation of this equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a conveying device for producing traditional Chinese medicine pills according to the present invention.

[0023] Figure 2 This is a schematic diagram of the conveyor platform structure of a conveying device for producing traditional Chinese medicine pills proposed in this invention.

[0024] Figure 3 This is a cross-sectional view of the end structure of the conveyor platform of a conveying device for producing traditional Chinese medicine pills, as proposed in this invention.

[0025] Figure 4 This is a cross-sectional view of the cavity plate of a conveying device for producing traditional Chinese medicine pills according to the present invention.

[0026] Figure 5 This invention proposes a conveying device for the production of traditional Chinese medicine pills. Figure 4 Enlarged view of the structure at point A in the middle.

[0027] Figure 6 This is an exploded view of the bulk material mechanism of a conveying device for producing traditional Chinese medicine pills, as proposed in this invention.

[0028] Figure 7 This is a cross-sectional view of the conveyor belt structure of a conveying device for producing traditional Chinese medicine pills according to the present invention.

[0029] Figure 8 This invention proposes a conveying device for the production of traditional Chinese medicine pills. Figure 7 Enlarged view of the structure at point B.

[0030] Figure 9This is an exploded view of the cooling mechanism structure of a conveying device for producing traditional Chinese medicine pills, as proposed in this invention.

[0031] In the diagram: 1. Feeding machine; 2. Conveyor; 3. Material dispersing mechanism; 301. Conveyor belt; 302. Rotating roller; 303. Motor; 304. Circular trough; 3041. Bowl-shaped wall; 305. Top block; 4. Cooling mechanism; 401. Cavity plate; 402. Exhaust pipe; 403. Air guide pipe; 404. Air guide port; 405. Clamp; 5. Limiting mechanism; 501. Shaft; 502. Paddle; 503. Inner arc roller; 504. Limiting groove; 5041. Arc-shaped surface; 6. Feeding cylinder; 7. Sloping bottom. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] The conveying equipment disclosed in this invention for the production of traditional Chinese medicine pills is mainly used in scenarios involving the conveying of traditional Chinese medicine pills.

[0034] Reference Figures 1 to 9 A conveying device for producing traditional Chinese medicine pills includes a feeding machine 1 and a conveyor 2 distributed at the end of the feeding machine 1. The conveyor 2 is equipped with a dispersing mechanism 3 for dispersing and transporting the pills. The dispersing mechanism 3 includes a conveyor belt 301 rotatably installed inside the conveyor 2 and a rotating roller 302 rotatably installed inside the conveyor 2. The rotating roller 302 is rotatably sleeved at both ends inside the conveyor belt 301. A motor 303 is horizontally fixed on the outside of the conveyor 2. The output end of the motor 303 horizontally penetrates into the interior of the conveyor 2 and is connected to the end of a rotating roller 302.

[0035] The side of the conveyor platform 2 is provided with a cooling mechanism 4 for rapid air cooling of the pills. The cooling mechanism 4 includes a cavity plate 401 fixedly installed on the side of the conveyor platform 2.

[0036] The top of the dispensing mechanism 3 is provided with a limiting mechanism 5 for limiting the position of the pills. The limiting mechanism 5 includes two shafts 501 rotatably installed inside the feeding machine 1. The ends of the shafts 501 are fixedly installed with paddles 502, which are distributed inside the cavity plate 401.

[0037] By using the material dispersing mechanism 3 in conjunction with the limiting mechanism 5, the pills located at the top of the conveyor platform 2 are evenly spread inside the material dispersing mechanism 3 and conveyed in the designated direction. At the same time, the cooling mechanism 4 uses air cooling to accelerate the solidification rate of the pills and reduce the adhesion rate between the pills and the material dispersing mechanism 3.

[0038] In this embodiment: The end of the feeding machine 1 is connected to an external pelleting device. As the entire equipment is started, the produced pills will be conveyed to the end of the conveyor 2 along with the operation of the feeding machine 1. At this time, the Chinese medicine pills falling from the feeding machine 1 will fall into the dispersing mechanism 3 at the top of the conveyor 2. The dispersing mechanism 3 will cooperate with the operation of the limiting mechanism 5 to disperse the accumulated pills and continue to convey them. At the same time, the cooling mechanism 4 will operate synchronously, blowing cold air towards the pills piled on the top of the dispersing mechanism 3 to accelerate the cooling of the pills. Meanwhile, the limiting mechanism 5 will cooperate with the operation of the cooling mechanism 4 to limit and control the undispersed Chinese medicine pills.

[0039] The bottom of the conveyor platform 2 is set as an inclined bottom 7, which causes the conveyor platform 2 to tilt towards the feed cylinder 6, preventing a large amount of Chinese medicinal materials from accumulating on the side of the limiting mechanism 5.

[0040] In the above scheme, considering the need to prevent the Chinese medicine pills from sticking together during transportation, the specific operation is as follows.

[0041] Reference Figures 1 to 8 In a preferred embodiment, the bulk material mechanism 3 further includes a plurality of circular grooves 304 uniformly provided inside the conveyor belt 301 for holding the pills, and a plurality of top blocks 305 uniformly fixed on the outside of a rotating roller 302 for ejecting the pills, with the top blocks 305 pressed into the inside of the circular grooves 304.

[0042] In this embodiment: the Chinese medicine pills falling from the feeding machine 1 will fall onto the conveyor belt 301 at the top of the conveyor 2. At this time, the motor 303 will rotate, driving the rotating roller 302 and the conveyor belt 301 to rotate synchronously. At the same time, the Chinese medicine pills falling onto the conveyor belt 301 will partially be stuck inside the circular groove 304 and move with the rotation of the conveyor belt 301. The pills that are not stuck inside the circular groove 304 will be restricted by the limiting mechanism 5 and remain at the end of the conveyor 2 close to the feeding machine 1. The pills that move synchronously with the conveyor belt 301 will eventually be squeezed by the top block 305 on the outside of the rotating roller 302 and slide out of the circular groove 304, completing the conveying of the Chinese medicine pills. The inner wall of the circular groove 304 is set as a bowl-shaped wall 3041 with a top inner diameter larger than the bottom inner diameter. The bowl-shaped wall 3041 completes the receiving of the pills without affecting the spherical structure of the Chinese medicine pills.

[0043] Furthermore, a feeding cylinder 6 is fixedly installed at one end of the conveyor platform 2 close to the feeding machine platform 1. The Chinese medicine pills falling from the end of the feeding machine platform 1 will enter through the feeding cylinder 6 and reach the top of the conveyor platform 2.

[0044] In the above scheme, considering that the Chinese medicine pills formed after the initial pill-making process are still in a hot state and their structural strength needs to be improved, the specific operation is as follows.

[0045] Reference Figures 1 to 5 , Figure 9 In a preferred embodiment, the cooling mechanism 4 further includes an exhaust pipe 402 horizontally fixed inside the conveyor platform 2. The end of the exhaust pipe 402 is connected to the interior of the cavity plate 401. At the same time, the exhaust pipe 402 is distributed inside the conveyor platform 2 close to one end of the feeding machine platform 1. A guide pipe 403 is connected to the end of the cavity plate 401.

[0046] In this embodiment: As the conveyor belt 301 runs, the Chinese medicine pills that have not entered the circular groove 304 will be blocked by the limiting mechanism 5 and remain below the feeding cylinder 6. At this time, the external cold air fan connected to the end of the air guide pipe 403 will start synchronously and introduce cold air into the cavity plate 401 through the air guide pipe 403. The cold air will then blow towards the top of the conveyor belt 301 through the exhaust pipe 402, thereby accelerating the cooling and shaping of the Chinese medicine pills.

[0047] It should be noted that: the side of the conveyor platform 2 is provided with a guide air vent 404, the exhaust pipe 402 is connected to the cavity plate 401 through the guide air vent 404, and several evenly distributed clamps 405 are sleeved on the outside of the guide air vent 403, and the clamps 405 are fixed to the outside of the conveyor platform 2.

[0048] In the above scheme, considering that the Chinese medicine pills that have not entered the circular groove 304 will move synchronously with the operation of the conveyor belt 301, the specific operation is as follows.

[0049] Reference Figures 1 to 5 , Figure 9 In a preferred embodiment, the limiting mechanism 5 further includes several inner arc rollers 503 that are sleeved and fixed on the outer side of each shaft 501, and several limiting grooves 504 are evenly opened on the top of the conveyor belt 301. The limiting grooves 504 and several circular grooves 304 are interspersed in the horizontal direction, and several inner arc rollers 503 located on the outer side of the two shafts 501 are interspersed in the interior of each limiting groove 504.

[0050] In this embodiment: the external air cooler connected to the end of the air duct 403 is started synchronously. While cold air is introduced into the cavity plate 401 through the air duct 403, the blown cold air will drive the paddle 502 synchronously. The paddle 502 will drive the shaft 501 and the inner arc roller 503 to rotate synchronously. The Chinese medicine pills that enter the circular groove 304 will be distributed inside the limiting groove 504 and will be blocked and rubbed by the inner arc roller 503 until the Chinese medicine pills deviate and enter the empty circular groove 304. The side wall of the limiting groove 504 is provided with an arc surface 5041. The arc surface 5041 contacts the top of the adjacent circular groove 304, which facilitates the Chinese medicine pills located inside the limiting groove 504 to slide into the interior of the circular groove 304.

[0051] Working Principle: During operation, the end of the feeding machine 1 is connected to an external pelleting device. As the entire equipment starts, the produced pellets are conveyed to the end of the conveyor 2 along with the operation of the feeding machine 1 until the pellets fall from the feeding machine 1 and onto the conveyor belt 301 at the top of the conveyor 2 via the discharge cylinder 6. At this time, the motor 303 rotates, driving the rotating roller 302 and the conveyor belt 301 to rotate synchronously. Simultaneously, some of the pellets falling onto the conveyor belt 301 will be stuck inside the circular groove 304 and move with the rotation of the conveyor belt 301. The pellets that are not stuck inside the circular groove 304 will be restricted by the shaft 501 and remain at the end of the conveyor 2 close to the feeding machine 1. The pellets that move synchronously with the conveyor belt 301 will eventually be squeezed by the top block 305 on the outside of the rotating roller 302. The pills slide inside the circular groove 304 to complete the conveying of the Chinese medicine pills. While the conveyor belt 301 is running, the Chinese medicine pills that have not entered the circular groove 304 will be blocked by the shaft 501 and stay below the feed cylinder 6. At this time, the external cold air fan connected to the end of the air guide pipe 403 will start synchronously and introduce cold air into the cavity plate 401 through the air guide pipe 403. The cold air will then blow towards the top of the conveyor belt 301 through the exhaust pipe 402, thereby accelerating the cooling and shaping of the Chinese medicine pills. At the same time, the blowing cold air will drive the paddle 502 synchronously. The paddle 502 will drive the shaft 501 and the inner arc roller 503 to rotate synchronously. The Chinese medicine pills that have entered the circular groove 304 will be distributed inside the limiting groove 504 and will be blocked and rubbed by the inner arc roller 503 until the Chinese medicine pills deviate and enter the empty circular groove 304.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A conveying device for producing traditional Chinese medicine pills, comprising a feeding machine (1) and a conveyor (2) distributed at the ends of the feeding machine (1), characterized in that, The conveyor platform (2) is equipped with a bulk material mechanism (3) for dispersing and transporting pills. The bulk material mechanism (3) includes a conveyor belt (301) rotatably installed inside the conveyor platform (2). A rotating roller (302) is rotatably installed inside the conveyor platform (2). The rotating roller (302) is rotatably sleeved on both ends of the conveyor belt (301). A motor (303) is horizontally fixed on the outside of the conveyor platform (2). The output end of the motor (303) horizontally penetrates into the inside of the conveyor platform (2) and is connected to the end of one of the rotating rollers (302). Several circular grooves (304) for holding pills are evenly opened inside the conveyor belt (301). Several top blocks (305) for pushing out pills are evenly fixed on the outside of one of the rotating rollers (302). The top blocks (305) are pressed into the inside of the circular grooves (304). The side of the conveyor platform (2) is provided with a cooling mechanism (4) for rapid air cooling of the pills. The cooling mechanism (4) includes a cavity plate (401) fixedly installed on the side of the conveyor platform (2). An exhaust pipe (402) is horizontally fixed inside the conveyor platform (2). The end of the exhaust pipe (402) is connected to the inside of the cavity plate (401). At the same time, the exhaust pipe (402) is distributed inside the conveyor platform (2) close to one end of the feeding machine platform (1). A guide pipe (403) is connected to the end of the cavity plate (401). An air guide port (404) is opened through the side of the conveyor platform (2). The exhaust pipe (402) is connected to the inside of the cavity plate (401) through the air guide port (404). The top of the dispensing mechanism (3) is provided with a limiting mechanism (5) for limiting the position of the pills. The limiting mechanism (5) includes two shafts (501) rotatably installed inside the feeding machine (1). The ends of the shafts (501) are fixedly installed with paddles (502). The paddles (502) are distributed inside the cavity plate (401). Several inner arc rollers (503) are sleeved and fixed on the outside of each shaft (501). Several limiting grooves (504) are evenly opened on the top of the conveyor belt (301). The limiting grooves (504) and several circular grooves (304) are interspersed in the horizontal direction. At the same time, several inner arc rollers (503) located outside the two shafts (501) are interspersed inside each limiting groove (504). By using the material dispersing mechanism (3) in conjunction with the limiting mechanism (5), the pills located on the top of the conveyor platform (2) are evenly spread inside the material dispersing mechanism (3) and conveyed in the specified direction. At the same time, the cooling mechanism (4) uses air cooling to accelerate the solidification rate of the pills and reduce the adhesion rate between the pills and the material dispersing mechanism (3).

2. The conveying equipment for producing traditional Chinese medicine pills according to claim 1, characterized in that, The inner wall of the circular groove (304) is configured as a bowl-shaped wall (3041) with a top inner diameter larger than the bottom inner diameter.

3. The conveying equipment for producing traditional Chinese medicine pills according to claim 1, characterized in that, The outer side of the air duct (403) is fitted with several evenly distributed clamps (405), which are fixed to the outer side of the conveyor platform (2).

4. The conveying equipment for producing traditional Chinese medicine pills according to claim 1, characterized in that, The sidewall of the limiting groove (504) is provided with an arc-shaped surface (5041), which contacts the top of the adjacent circular groove (304).

5. The conveying equipment for producing traditional Chinese medicine pills according to claim 1, characterized in that, The conveyor platform (2) has a feeding cylinder (6) fixedly installed at one end close to the feeding machine platform (1).

6. The conveying equipment for producing traditional Chinese medicine pills according to claim 5, characterized in that, The bottom of the conveyor platform (2) is set as a sloping bottom (7), which causes the conveyor platform (2) to tilt toward the feed cylinder (6).

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